(We sometimes lose shoes and are stuck with one which we can’t sell. When this happens and it is a man’s shoe for the right foot, we sell them very cheaply to a war veteran who only has one leg. On this day, the veteran has just paid for one. There is a man behind him in the queue.)

Customer: “Why does he get those shoes so cheaply?”

Me: “Because he is only buying the right shoe, not a pair.”

Customer: “Why would he want just one?”

Me: “Because he only has one leg. He lost the other in combat.”

Customer: “Yeah, but even if he lost one leg, he’s still got two feet, right?”